Analgesic Effect of an Injection of Botulinum Toxin Type A in the Ganglion Impar in Patients With Chronic Proctalgia

Inclusion Criteria

• •Age \> 18 years
• •Patient with chronic proctalgia according to the criteria of Rome III
• •Chronic or recurrent rectal pain
• •Pains evolve over periods of at least 20 minutes
• •With the exclusion of other causes of rectal pain: ischemic, inflammatory bowel disease, cryptic lesions, intramuscular abscess, anal fissure, hemorrhoids, prostatitis and isolated coccydynia
• •Pains evolve in a regular way since more than 3 months and the symptoms started since at least 6 months
• •These chronic proctalgia include syndromes of anus elevator and nonspecific functional anorectal pains
• •Patient with positive anesthetic block of ganglion Impar (minimum of 30 days before D0 and maximum of 270 days before D0)
• •Main score (SP) ≥ 4 before infiltration of botulinum toxin type A
• •Signed informed consent
• •Subjects affiliated with an appropriate social security system